Search
Subjects
BGCSE
Biology
Chemistry
Combined Science
Physics
BJC
Health Science
General Science
Social Studies
2023 BGCSE Biology Paper-1 Question-28
Questions
Q-1
Q-2
Q-3
Q-4
Q-5
Q-6
Q-7
Q-8
Q-9
Q-10
Q-11
Q-12
Q-13
Q-14
Q-15
Q-16
Q-17
Q-18
Q-19
Q-20
Q-21
Q-22
Q-23
Q-24
Q-25
Q-26
Q-27
Q-28
Q-29
Q-30
Q-31
Q-32
Q-33
Q-34
Q-35
Q-36
Q-37
Q-38
Q-39
Q-40
Q-41
Q-42
Q-43
Q-44
Q-45
Q-46
Q-47
Q-48
Q-49
Q-50
The diagram shows a cross-section through an alveolus and a capillary. Why does oxygen move from P to Q?
oxygen in inspired air in the alveolus must replace carbon dioxide in the blood
the concentration of carbon dioxide is lower in the alveolus than the blood
the concentration of oxygen in the blood is lower than in the air in the capilallary
the concentration of oxygen in the blood is lower than in the air in the alveolus
Submit
Next
